> When I declined a calendar appointment, I'd like to have the
> appointment remain on my calendar, but show the time as available.
Outlook can't do this.
> By default, Outlook removes the appointment when I decline the
> appointment. Is there a way to override this?
You could leave it as tentative, save it to a second calendar folder, then
decline the request. The second calendar will contain the list of meetings
or you declined and since free/busy informaiton won't be published from that
calendar, it will show as available.

Signature
Brian Tillman [MVP-Outlook]